Workspace owners

Hello!! I am currently a PBI administrator, I am looking for a way to identify or associate who are the owners of the existing work areas in the company, since we are going to carry out a migration from pro to premium and we need to initially raise those responsible for each area to start an exploraicon work and deterinar which of them should be scaled to the Premium capacity, we currently have the PRO.

When I generate the report of the work areas, this data is not there.

I appreciate if anyone knows how to get this information.

Thanks a lot.